K20
For K20, manufacturer is Sandvik; grade designation(s) is GC1020 GC1120 GC3025 GC3020 GC4025, recorded from its source on 2026-08-11.
- ISO application code
- K20 verified
- Manufacturer
- Sandvik our reading
- Grade designation(s)
- GC1020 GC1120 GC3025 GC3020 GC4025 verified
Values marked our reading are our classification of what the source says — the source does not print them in those words. The quote below is the evidence for each one; judge it yourself.
What the source says
K20 | R-300 R-400 | UP10H UC6010 AP15TF | GC1020 GC1120 GC3025 GC3020 GC4025 |
— romaycorp.com, retrieved 2026-08-11
Sources disagree
More than one authority states this, and they do not state the same thing. Both are reproduced with the source each came from — deciding between them is yours, not ours.
Grade designation(s)
romaycorp.com says grade designation(s) is GC1020 GC1120 GC3025 GC3020 GC4025, as of 2026-08-11.
K20 | R-300 R-400 | UP10H UC6010 AP15TF | GC1020 GC1120 GC3025 GC3020 GC4025 |
https://romaycorp.com/charts/carbide-comparison-chart/
aceratool.com says grade designation(s) is GC3215 GC3020 K20W, as of 2026-08-11.
K20 | AC3125 | GC3215 GC3020 K20W |
Sources
- romaycorp.comhttps://romaycorp.com/charts/carbide-comparison-chart/
- aceratool.comhttps://www.aceratool.com/carbide-insert-grades-chart/